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Jurnal Didaktik Matematika
Published by Universitas Syiah Kuala
ISSN : 23554185     EISSN : 25488546     DOI : https://doi.org/10.24815/jdm
Core Subject : Education,
Education Mathematics
JURNAL DIDAKTIK MATEMATIKA IS A SCIENTIFIC JOURNAL IN MATHEMATICS TEACHING AND LEARNING, TECHNOLOGY IN MATHEMATICS TEACHING AND LEARNING, AND MATHEMATICS EDUCATION. THE SCOPE OF THE JOURNAL INCLUDES: a. Mathematics teaching and learning in primary school, high school, and higher education. b. Technology in mathematics teaching and learning c. Teacher professional development in mathematics d. Innovative mathematics teaching and learning applying various approaches such as realistic mathematics education, contextual teaching, and learning (CTL) approach, and many others. e. Studies related to mathematics teaching and learning in a broader context
Arjuna Subject : Umum - Umum
Articles 225 Documents
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The Trigonometric Adaptive Worksheet Performance in Optimizing Trigonometric Thinking of Prospective Mathematics Teacher: Single Subject Research Usep Sholahudin; Rina Oktaviyanthi
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.33216

Abstract

The ability to think in trigonometry supports the understanding of trigonometry concepts, which still pose challenges for first-year university students, including prospective teachers. The Trigonometric Adaptive Worksheet is one of the student worksheets to optimize trigonometric thinking abilities. This research aimed to assess the performance of the Trigonometric Adaptive Worksheet on the trigonometric thinking abilities of prospective mathematics teachers. Quantitative descriptive research with a Single Subject Research method and a basic design of A (baseline) - B (intervention) was employed as the research approach. Three prospective mathematics teachers from three categories of high, moderate, and low mathematical abilities were selected as research subjects. The data related to changes in individual behavior regarding progress in trigonometric thinking abilities were analyzed using within-condition analysis and between-condition analysis procedures. Based on the single-subject data analysis of the three research subjects, it is evident that moderate and low subjects tend to benefit more from implementing the Trigonometric Adaptive Worksheet. These findings have important implications, suggesting adaptive worksheets can enhance individual learning outcomes by tailoring content to individuals' needs. The worksheet adaptability and personalization provide an opportunity to improve trigonometry instruction's effectiveness.
Characteristics of Mathematical Reversible Thinking in Junior High School Students Aneu - Pebrianti; Suhendra Suhendra; Elah Nurlaelah; Dadang Juandi
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.31820

Abstract

Reversible thinking is a mathematical competency that influences students' success in solving problems. Problem-solving is the core of mathematics education. This research aims to identify the characteristics of students' thinking in solving problems that require reversible thinking ability. A qualitative method with a case study approach was used in this research. The study used tests and interviews on 44 eighth-grade students in West Java, Indonesia. In-depth interviews were conducted with representative students whose answers were representative of the other students. All students' answers were analyzed using the thematic analysis software ATLAS.ti. According to the characteristic indicators of reversible thinking. This study found that junior high school students' ability in reversible thinking is not optimal. Some students who successfully solve problems are limited to using backward thinking processes rather than invertible ones. The other students still have difficulties constructing answers due to the limited context when students first learn the concept (problems with forward-thinking). Thus, this ability needs to be understood by students as one factor that supports the success of the problem-solving process.
Exploring Students Mathematical Understanding according to Skemps Theory in Solving Statistical Problems Christina Monika Samosir; Jarnawi Afgani Dahlan; Tatang Herman; Sufyani Prabawanto
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.32598

Abstract

Understanding a concept is not only for mastering the next concept. It is the foundational skill used to solve mathematical problems. This study aims to explore students' conceptual understanding.This research is qualitative research with phenomenology. The participants in this study consisted of 18 eighth-grade students from one of Bandung's private secondary schools. After the students were given the test, six students were selected as research subjects. This aims to ensure that data can be obtained thoroughly and comprehensively. Data collection techniques included tests, interviews, and observations, with research instruments comprising a test and an interview guideline. Data saturation has been achieved. The results of this study are as follows: 1) students with relational understanding are fewer in number than students with instrumental understanding. 2) students find it most difficult to use the interconnections of various mathematical concepts in solving problems. 3) students' difficulties are due to their lack of ability in the concept of basic operations and their lack of understanding of the problems. Therefore, teachers need to strengthen students' understanding of basic operations and the concepts of mean, mode, and median to effectively connect these concepts with their problems.
The Relationship between Mathematics Teachers TPACK and Students' Mathematical Resilience Anwaril Hamidy; Arista Wibowo
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.33346

Abstract

Previous research shows that teachers play a role in determining students' math resilience. However, there is still little research on the type of teacher competencies that support students' mathematical resilience. This study examines the effect of mathematics teachers Technological Pedagogical Content Knowledge (TPACK) on students' math resilience. This quantitative study involved 163 students from a junior high school and four senior high schools in the East Kalimantan region. Data was collected through questionnaires that measured mathematics teachers' TPACK from the student perspective and students math resilience. Information about the gender of respondents is also collected. Data were analyzed using multiple linear regression and moderated regression. The results exposed that the mathematics teachers TPACK significantly affected students' math resilience. The components of Pedagogical Knowledge and Technological Pedagogical Content Knowledge partially affect students' math resilience. However, the study found no moderation by student gender on the relationship between mathematics teachers' TPACK and students' math resilience. This study contributes significantly to understanding the role of mathematics teachers' TPACK in improving students' math resilience. The results can be a reference for related parties, especially in developing more effective mathematics teacher training and competency development programs.
Mathematics Teacher Competencies and Self-Efficacy in Implementing National Curriculum Ramadian Radite; Heri Retnawati
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.32653

Abstract

The new Indonesia National Curriculum, the Merdeka Curriculum, was officially implemented in the 2022/2023 academic year. There are differences between public and private schools regarding facilities and teachers' employment status. Most teachers in public schools are Civil Servants (CST), while most private teachers are non-CST. This research analyzes the mathematics teachers' competence and self-efficacy of CST and non-CST in implementing the Merdeka Curriculum. This research used mixed methods of survey correlational and expos facto. The number of teacher respondents attained by purposive sampling was 34 CST and 54 non-CST. Teachers' competence data were collected using multiple-choice tests on professional and pedagogical competence. Self-efficacy data were collected using a questionnaire adapted from Bandura, while factors causing teachers' self-efficacy were collected using interviews. The research finding shows that in implementing the Merdeka Curriculum, (1) teachers' competence from both teachers' group was low, whereas self-efficacy were moderate, (2) there is no difference in competence between CST and non-CST, but there are differences in self-efficacy, and (3) factors that affect the differences in the self-efficacy are beliefs towards the success of implementing Merdeka Curriculum, support from the headmaster and the government, salary eligibility, and difficulties aspects.
Developing Number Puzzle Learning Media for Elementary School Dyslexic Students: Single Subject Research Sumarno Ismail; Nursiya Bito; Franky Alfrits Oroh; Nisky Imansyah Yahya; Fuzi Sandra Talibo
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.30955

Abstract

A child displaying symptoms of dyslexic learning disorders requires assistance in accurately identifying numbers, particularly those that share resemblances. This research aimed to develop media for teaching dyslexic children to help them identify numbers correctly.This research employed a development and single-subject research method.The subject was a child with symptoms of dyslexia learning disorders from primary school in Gorontalo, Indonesia. The research instruments used were observation sheets and media validation. The findings revealed that prior to engaging with the puzzle activity, the dyslexic student demonstrated the capability to identify a range of 4 to 5 numbers accurately. However, after participating in the puzzle activity, the dyslexic student exhibited an improved performance, achieving the ability to correctly recognize and recall 8 to 10 digits in both writing and memory. The number puzzle media was developed by dividing the puzzle into two parts: the part of the screen containing the complete picture and the base placing the puzzle pieces. The puzzle pieces were made by stacking several formed duplex parts, then covered with paper glued together to create a waterproof product. The puzzle focused on the numbers contrasting in color. The numbers were divided into several parts to make it easier for dyslexic students to identify models of these numbers. After conducting media testing on a dyslexic student, the analysis demonstrated a positive impact of the media on learning outcomes. This research suggests a notable improvement in the numerical identification skills of the dyslexic student
Development of Socrates-Based Mathematical Statistics Teaching Materials Zubaidah Rasiman; Dona Fitriawan
Didaktik Matematika Vol 10, No 1 (2023): April 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i1.28881

Abstract

The aims of this study are to: a) develop Socrates-based mathematical statistics teaching materials; b) testing the quality of teaching materials in terms of validity, effectiveness, and practicality. The research was carried out in the even semester of 2021/2022 in the fourth semester of the mathematical statistics course for all classes. This study uses a development method using a 4-D model consisting of 4 main stages, namely define, design, develop, disseminate. The product developed is in the form of teaching materials that have been tested for feasibility with content validity, effectiveness tests by analyzing student learning outcomes after the teaching materials are used and practicality tests through student response analysis. The collection techniques and instruments are: 1) indirect communication techniques with the instruments being expert validation questionnaires and response questionnaires for instrument validation and student responses; 2) the measurement technique with the instrument is a test of learning outcomes for the effectiveness of the product; 3) direct communication techniques with interview sheets as instruments to find out the advantages and disadvantages of teaching materials when used for students. The data analysis techniques are: a) describe or describe each step of development with a 4-D model; b) expert validation analysis on the feasibility of teaching materials, namely qualitative descriptive, the results of the study are stated in the form of logical analysis; c) calculation of the validity of the assessment results and validation of the consistency of the experts using Aiken's formulation. The overall research results are: 1) the development of Socrates-based mathematical statistics teaching materials is carried out according to the main 4-D stages in sequence; 2) Socrates-based mathematical statistics teaching materials have content validity and reliability with very high criteria; 3) student learning outcomes after using Socrates-based mathematics teaching materials are classified as high criteria. So it can be concluded that the teaching materials developed are effective.
Measuring Learning Loss Due to Disruptions from COVID-19: Perspectives from the Concept of Fractions Mulia Lestari; Rahmah Johar; Mailizar Mailizar; Ali Ridho
Didaktik Matematika Vol 10, No 1 (2023): April 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i1.28580

Abstract

Ineffective learning during Covid-19 can be a major cause of learning loss. Through polytomous item response theory analysis, this study seeks to identify learning loss of fractions and investigate the reliability and validity of the DINA model diagnostic test. This study involved 177 Grade 8 students from six junior high schools in Banda Aceh, Indonesia, to obtain information about the validity and reliability of the diagnostic test and learning loss of fraction due to Covid-19. The research was conducted by designing diagnostic test, expert validation, and empirical testing. Multiple choice problems with polytomous options were developed. This study produced 20 valid problems based on the level of item discriminant, item difficulty, and slip and guess, with a reliability of 0.899. This study revealed that learning loss was experienced by 62 students from low-level junior high schools (100%), 51 students from middle-level junior high schools (98%), and 54 students from high-level junior high schools (85.7%). It can be said that low-level schools have the highest percentage of students with learning loss. It is recommended that future studies evaluate the effectiveness of diagnostic tests in identifying learning weaknesses in mathematics before semester exams using the items generated in this study.
Students Mathematical Representation and Communication Ability in Mathematics Problem Solving Pieter Zakarias Tupamahu; Tanwey Gerson Ratumanan; Christina Laamena
Didaktik Matematika Vol 10, No 1 (2023): April 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i1.29376

Abstract

In learning mathematics, representation and communication ability are required by students to solve problems. The ability to represent is crucial for students to simplify the learning process, while students who have good mathematical communication abilities can easily solve a problem. This study applied a sequential mixed methods approach. Quantitative data was obtained from the results of the written test, then the ability of mathematical representation and communication in solving problems on linear program material was analyzed qualitatively. The participants of this study were 59 students from one of the senior high schools in Ambon, Indonesia. The research phase was begun with students being asked to solve mathematics problems and then researchers analyze representation and written communication ability. The largest percentage of students' results on the test was in the very low category of mathematical representation and communication ability. The results showed that students who had good representation and communication abilities would be able to solve problems. There were significant correlations and a very strong correlation between mathematical representation and communication ability with a Pearson Correlation coefficient of 0.915. After obtaining the test result, subjects were selected based on the category of ability to conduct interviews. Based on the results of the interview, the mathematical representation ability that the subject uses well will directly involve mathematical communication skills well, and vice versa.
Students Errors in Solving Plane Geometry Problems Using E-Learning-based Diagnostic Tests Mukhlis Hidayat; Tuti Zubaidah; Munira Ulfa; Elizar Elizar
Didaktik Matematika Vol 10, No 1 (2023): April 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i1.31938

Abstract

During the Covid-19 pandemic, the implementation of online and shift learning systems has been identified as one factor contributing to learning loss in mathematics problem-solving skills specifically in plane geometry problems. The primary objective of this research was to investigate the different types of errors committed by junior high school students in Banda Aceh, Indonesia, in solving plane geometry problems using e-learning diagnostic tests. A descriptive qualitative approach was adopted, and 24 Year 8 students were selected as subjects. The data were collected through tests and interviews, and data analysis involved data reduction, data presentation, data verification, and drawing conclusions. The findings revealed that the percentage of students' errors in solving conceptual problems, principal problems, and verbal problems were 76.39%, 68.75%, and 75%, respectively. Subsequently, the results from the second test and interviews with six students showed that students encountered several conceptual errors, including errors in stating angle symbols, errors in identifying the type of shape provided, errors in deducing information regarding properties, perimeter, and area of plane geometry, lack of knowledge regarding the application of the appropriate plane geometry formula, and inability to solve problems using the correct procedure. Principal errors were related to algebraic operations, while verbal errors involved translating problems and improper application of concepts and principles. The understanding of the types of errors will help teachers detect errors made the students early.

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